src/third_party/webrtc/modules/audio_coding/codecs/opus/opus_unittest.cc

   1 /*
   2  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10 #include <string>
  11
  12 #include "testing/gtest/include/gtest/gtest.h"
  13 #include "webrtc/modules/audio_coding/codecs/opus/interface/opus_interface.h"
  14 #include "webrtc/modules/audio_coding/codecs/opus/opus_inst.h"
  15 #include "webrtc/test/testsupport/fileutils.h"
  16
  17 namespace webrtc {
  18
  19 // Number of samples in a 60 ms stereo frame, sampled at 48 kHz.
  20 const int kOpusMaxFrameSamples = 48 * 60 * 2;
  21 // Maximum number of bytes in output bitstream.
  22 const size_t kMaxBytes = 1000;
  23 // Number of samples-per-channel in a 20 ms frame, sampled at 48 kHz.
  24 const int kOpus20msFrameSamples = 48 * 20;
  25 // Number of samples-per-channel in a 10 ms frame, sampled at 48 kHz.
  26 const int kOpus10msFrameSamples = 48 * 10;
  27
  28 class OpusTest : public ::testing::Test {
  29  protected:
  30   OpusTest();
  31   virtual void SetUp();
  32
  33   void TestSetMaxPlaybackRate(opus_int32 expect, int32_t set);
  34
  35   WebRtcOpusEncInst* opus_mono_encoder_;
  36   WebRtcOpusEncInst* opus_stereo_encoder_;
  37   WebRtcOpusDecInst* opus_mono_decoder_;
  38   WebRtcOpusDecInst* opus_mono_decoder_new_;
  39   WebRtcOpusDecInst* opus_stereo_decoder_;
  40   WebRtcOpusDecInst* opus_stereo_decoder_new_;
  41
  42   int16_t speech_data_[kOpusMaxFrameSamples];
  43   int16_t output_data_[kOpusMaxFrameSamples];
  44   uint8_t bitstream_[kMaxBytes];
  45 };
  46
  47 OpusTest::OpusTest()
  48     : opus_mono_encoder_(NULL),
  49       opus_stereo_encoder_(NULL),
  50       opus_mono_decoder_(NULL),
  51       opus_mono_decoder_new_(NULL),
  52       opus_stereo_decoder_(NULL),
  53       opus_stereo_decoder_new_(NULL) {
  54 }
  55
  56 void OpusTest::SetUp() {
  57   FILE* input_file;
  58   const std::string file_name =
  59         webrtc::test::ResourcePath("audio_coding/speech_mono_32_48kHz", "pcm");
  60   input_file = fopen(file_name.c_str(), "rb");
  61   ASSERT_TRUE(input_file != NULL);
  62   ASSERT_EQ(kOpusMaxFrameSamples,
  63             static_cast<int32_t>(fread(speech_data_, sizeof(int16_t),
  64                                        kOpusMaxFrameSamples, input_file)));
  65   fclose(input_file);
  66   input_file = NULL;
  67 }
  68
  69 void OpusTest::TestSetMaxPlaybackRate(opus_int32 expect, int32_t set) {
  70   opus_int32 bandwidth;
  71   // Test mono encoder.
  72   EXPECT_EQ(0, WebRtcOpus_SetMaxPlaybackRate(opus_mono_encoder_, set));
  73   opus_encoder_ctl(opus_mono_encoder_->encoder,
  74                    OPUS_GET_MAX_BANDWIDTH(&bandwidth));
  75   EXPECT_EQ(expect, bandwidth);
  76   // Test stereo encoder.
  77   EXPECT_EQ(0, WebRtcOpus_SetMaxPlaybackRate(opus_stereo_encoder_, set));
  78   opus_encoder_ctl(opus_stereo_encoder_->encoder,
  79                    OPUS_GET_MAX_BANDWIDTH(&bandwidth));
  80   EXPECT_EQ(expect, bandwidth);
  81 }
  82
  83 // Test failing Create.
  84 TEST_F(OpusTest, OpusCreateFail) {
  85   // Test to see that an invalid pointer is caught.
  86   EXPECT_EQ(-1, WebRtcOpus_EncoderCreate(NULL, 1));
  87   EXPECT_EQ(-1, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 3));
  88   EXPECT_EQ(-1, WebRtcOpus_DecoderCreate(NULL, 1));
  89   EXPECT_EQ(-1, WebRtcOpus_DecoderCreate(&opus_mono_decoder_, 3));
  90 }
  91
  92 // Test failing Free.
  93 TEST_F(OpusTest, OpusFreeFail) {
  94   // Test to see that an invalid pointer is caught.
  95   EXPECT_EQ(-1, WebRtcOpus_EncoderFree(NULL));
  96   EXPECT_EQ(-1, WebRtcOpus_DecoderFree(NULL));
  97 }
  98
  99 // Test normal Create and Free.
 100 TEST_F(OpusTest, OpusCreateFree) {
 101   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 102   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_mono_decoder_, 1));
 103   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 104   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_, 2));
 105   EXPECT_TRUE(opus_mono_encoder_ != NULL);
 106   EXPECT_TRUE(opus_mono_decoder_ != NULL);
 107   EXPECT_TRUE(opus_stereo_encoder_ != NULL);
 108   EXPECT_TRUE(opus_stereo_decoder_ != NULL);
 109   // Free encoder and decoder memory.
 110   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 111   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_mono_decoder_));
 112   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 113   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_));
 114 }
 115
 116 TEST_F(OpusTest, OpusEncodeDecodeMono) {
 117   // Create encoder memory.
 118   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 119   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_mono_decoder_, 1));
 120   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_mono_decoder_new_, 1));
 121
 122   // Set bitrate.
 123   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_mono_encoder_, 32000));
 124
 125   // Check number of channels for decoder.
 126   EXPECT_EQ(1, WebRtcOpus_DecoderChannels(opus_mono_decoder_));
 127   EXPECT_EQ(1, WebRtcOpus_DecoderChannels(opus_mono_decoder_new_));
 128
 129   // Encode & decode.
 130   int16_t encoded_bytes;
 131   int16_t audio_type;
 132   int16_t output_data_decode_new[kOpusMaxFrameSamples];
 133   int16_t output_data_decode[kOpusMaxFrameSamples];
 134   encoded_bytes = WebRtcOpus_Encode(opus_mono_encoder_, speech_data_,
 135                                     kOpus20msFrameSamples, kMaxBytes,
 136                                     bitstream_);
 137   EXPECT_EQ(kOpus20msFrameSamples,
 138             WebRtcOpus_DecodeNew(opus_mono_decoder_new_, bitstream_,
 139                                  encoded_bytes, output_data_decode_new,
 140                                  &audio_type));
 141   EXPECT_EQ(kOpus20msFrameSamples,
 142             WebRtcOpus_Decode(opus_mono_decoder_, bitstream_,
 143                               encoded_bytes, output_data_decode,
 144                               &audio_type));
 145
 146   // Data in |output_data_decode_new| should be the same as in
 147   // |output_data_decode|.
 148   for (int i = 0; i < kOpus20msFrameSamples; i++) {
 149     EXPECT_EQ(output_data_decode_new[i], output_data_decode[i]);
 150   }
 151
 152   // Free memory.
 153   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 154   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_mono_decoder_));
 155   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_mono_decoder_new_));
 156 }
 157
 158 TEST_F(OpusTest, OpusEncodeDecodeStereo) {
 159   // Create encoder memory.
 160   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 161   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_, 2));
 162   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_new_, 2));
 163
 164   // Set bitrate.
 165   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_stereo_encoder_, 64000));
 166
 167   // Check number of channels for decoder.
 168   EXPECT_EQ(2, WebRtcOpus_DecoderChannels(opus_stereo_decoder_));
 169   EXPECT_EQ(2, WebRtcOpus_DecoderChannels(opus_stereo_decoder_new_));
 170
 171   // Encode & decode.
 172   int16_t encoded_bytes;
 173   int16_t audio_type;
 174   int16_t output_data_decode_new[kOpusMaxFrameSamples];
 175   int16_t output_data_decode[kOpusMaxFrameSamples];
 176   int16_t output_data_decode_slave[kOpusMaxFrameSamples];
 177   encoded_bytes = WebRtcOpus_Encode(opus_stereo_encoder_, speech_data_,
 178                                     kOpus20msFrameSamples, kMaxBytes,
 179                                     bitstream_);
 180   EXPECT_EQ(kOpus20msFrameSamples,
 181             WebRtcOpus_DecodeNew(opus_stereo_decoder_new_, bitstream_,
 182                                  encoded_bytes, output_data_decode_new,
 183                                  &audio_type));
 184   EXPECT_EQ(kOpus20msFrameSamples,
 185             WebRtcOpus_Decode(opus_stereo_decoder_, bitstream_,
 186                               encoded_bytes, output_data_decode,
 187                               &audio_type));
 188   EXPECT_EQ(kOpus20msFrameSamples,
 189             WebRtcOpus_DecodeSlave(opus_stereo_decoder_, bitstream_,
 190                                    encoded_bytes, output_data_decode_slave,
 191                                    &audio_type));
 192
 193   // Data in |output_data_decode_new| should be the same as in
 194   // |output_data_decode| and |output_data_decode_slave| interleaved to a
 195   // stereo signal.
 196   for (int i = 0; i < kOpus20msFrameSamples; i++) {
 197     EXPECT_EQ(output_data_decode_new[i * 2], output_data_decode[i]);
 198     EXPECT_EQ(output_data_decode_new[i * 2 + 1], output_data_decode_slave[i]);
 199   }
 200
 201   // Free memory.
 202   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 203   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_));
 204   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_new_));
 205 }
 206
 207 TEST_F(OpusTest, OpusSetBitRate) {
 208   // Test without creating encoder memory.
 209   EXPECT_EQ(-1, WebRtcOpus_SetBitRate(opus_mono_encoder_, 60000));
 210   EXPECT_EQ(-1, WebRtcOpus_SetBitRate(opus_stereo_encoder_, 60000));
 211
 212   // Create encoder memory, try with different bitrates.
 213   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 214   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 215   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_mono_encoder_, 30000));
 216   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_stereo_encoder_, 60000));
 217   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_mono_encoder_, 300000));
 218   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_stereo_encoder_, 600000));
 219
 220   // Free memory.
 221   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 222   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 223 }
 224
 225 TEST_F(OpusTest, OpusSetComplexity) {
 226   // Test without creating encoder memory.
 227   EXPECT_EQ(-1, WebRtcOpus_SetComplexity(opus_mono_encoder_, 9));
 228   EXPECT_EQ(-1, WebRtcOpus_SetComplexity(opus_stereo_encoder_, 9));
 229
 230   // Create encoder memory, try with different complexities.
 231   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 232   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 233
 234   EXPECT_EQ(0, WebRtcOpus_SetComplexity(opus_mono_encoder_, 0));
 235   EXPECT_EQ(0, WebRtcOpus_SetComplexity(opus_stereo_encoder_, 0));
 236   EXPECT_EQ(0, WebRtcOpus_SetComplexity(opus_mono_encoder_, 10));
 237   EXPECT_EQ(0, WebRtcOpus_SetComplexity(opus_stereo_encoder_, 10));
 238   EXPECT_EQ(-1, WebRtcOpus_SetComplexity(opus_mono_encoder_, 11));
 239   EXPECT_EQ(-1, WebRtcOpus_SetComplexity(opus_stereo_encoder_, 11));
 240
 241   // Free memory.
 242   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 243   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 244 }
 245
 246 // Encode and decode one frame (stereo), initialize the decoder and
 247 // decode once more.
 248 TEST_F(OpusTest, OpusDecodeInit) {
 249   // Create encoder memory.
 250   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 251   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_, 2));
 252   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_new_, 2));
 253
 254   // Encode & decode.
 255   int16_t encoded_bytes;
 256   int16_t audio_type;
 257   int16_t output_data_decode_new[kOpusMaxFrameSamples];
 258   int16_t output_data_decode[kOpusMaxFrameSamples];
 259   int16_t output_data_decode_slave[kOpusMaxFrameSamples];
 260   encoded_bytes = WebRtcOpus_Encode(opus_stereo_encoder_, speech_data_,
 261                                     kOpus20msFrameSamples, kMaxBytes,
 262                                     bitstream_);
 263   EXPECT_EQ(kOpus20msFrameSamples,
 264             WebRtcOpus_DecodeNew(opus_stereo_decoder_new_, bitstream_,
 265                                  encoded_bytes, output_data_decode_new,
 266                                  &audio_type));
 267   EXPECT_EQ(kOpus20msFrameSamples,
 268             WebRtcOpus_Decode(opus_stereo_decoder_, bitstream_,
 269                               encoded_bytes, output_data_decode,
 270                               &audio_type));
 271   EXPECT_EQ(kOpus20msFrameSamples,
 272             WebRtcOpus_DecodeSlave(opus_stereo_decoder_, bitstream_,
 273                                    encoded_bytes, output_data_decode_slave,
 274                                    &audio_type));
 275
 276   // Data in |output_data_decode_new| should be the same as in
 277   // |output_data_decode| and |output_data_decode_slave| interleaved to a
 278   // stereo signal.
 279   for (int i = 0; i < kOpus20msFrameSamples; i++) {
 280     EXPECT_EQ(output_data_decode_new[i * 2], output_data_decode[i]);
 281     EXPECT_EQ(output_data_decode_new[i * 2 + 1], output_data_decode_slave[i]);
 282   }
 283
 284   EXPECT_EQ(0, WebRtcOpus_DecoderInitNew(opus_stereo_decoder_new_));
 285   EXPECT_EQ(0, WebRtcOpus_DecoderInit(opus_stereo_decoder_));
 286   EXPECT_EQ(0, WebRtcOpus_DecoderInitSlave(opus_stereo_decoder_));
 287
 288   EXPECT_EQ(kOpus20msFrameSamples,
 289             WebRtcOpus_DecodeNew(opus_stereo_decoder_new_, bitstream_,
 290                                  encoded_bytes, output_data_decode_new,
 291                                  &audio_type));
 292   EXPECT_EQ(kOpus20msFrameSamples,
 293             WebRtcOpus_Decode(opus_stereo_decoder_, bitstream_,
 294                               encoded_bytes, output_data_decode,
 295                               &audio_type));
 296   EXPECT_EQ(kOpus20msFrameSamples,
 297             WebRtcOpus_DecodeSlave(opus_stereo_decoder_, bitstream_,
 298                                    encoded_bytes, output_data_decode_slave,
 299                                    &audio_type));
 300
 301   // Data in |output_data_decode_new| should be the same as in
 302   // |output_data_decode| and |output_data_decode_slave| interleaved to a
 303   // stereo signal.
 304   for (int i = 0; i < kOpus20msFrameSamples; i++) {
 305     EXPECT_EQ(output_data_decode_new[i * 2], output_data_decode[i]);
 306     EXPECT_EQ(output_data_decode_new[i * 2 + 1], output_data_decode_slave[i]);
 307   }
 308
 309   // Free memory.
 310   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 311   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_));
 312   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_new_));
 313 }
 314
 315 TEST_F(OpusTest, OpusEnableDisableFec) {
 316   // Test without creating encoder memory.
 317   EXPECT_EQ(-1, WebRtcOpus_EnableFec(opus_mono_encoder_));
 318   EXPECT_EQ(-1, WebRtcOpus_DisableFec(opus_stereo_encoder_));
 319
 320   // Create encoder memory, try with different bitrates.
 321   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 322   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 323
 324   EXPECT_EQ(0, WebRtcOpus_EnableFec(opus_mono_encoder_));
 325   EXPECT_EQ(0, WebRtcOpus_EnableFec(opus_stereo_encoder_));
 326   EXPECT_EQ(0, WebRtcOpus_DisableFec(opus_mono_encoder_));
 327   EXPECT_EQ(0, WebRtcOpus_DisableFec(opus_stereo_encoder_));
 328
 329   // Free memory.
 330   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 331   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 332 }
 333
 334 TEST_F(OpusTest, OpusSetPacketLossRate) {
 335   // Test without creating encoder memory.
 336   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_mono_encoder_, 50));
 337   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_stereo_encoder_, 50));
 338
 339   // Create encoder memory, try with different bitrates.
 340   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 341   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 342
 343   EXPECT_EQ(0, WebRtcOpus_SetPacketLossRate(opus_mono_encoder_, 50));
 344   EXPECT_EQ(0, WebRtcOpus_SetPacketLossRate(opus_stereo_encoder_, 50));
 345   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_mono_encoder_, -1));
 346   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_stereo_encoder_, -1));
 347   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_mono_encoder_, 101));
 348   EXPECT_EQ(-1, WebRtcOpus_SetPacketLossRate(opus_stereo_encoder_, 101));
 349
 350   // Free memory.
 351   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 352   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 353 }
 354
 355 TEST_F(OpusTest, OpusSetMaxPlaybackRate) {
 356   // Test without creating encoder memory.
 357   EXPECT_EQ(-1, WebRtcOpus_SetMaxPlaybackRate(opus_mono_encoder_, 20000));
 358   EXPECT_EQ(-1, WebRtcOpus_SetMaxPlaybackRate(opus_stereo_encoder_, 20000));
 359
 360   // Create encoder memory, try with different bitrates.
 361   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 362   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 363
 364   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_FULLBAND, 48000);
 365   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_FULLBAND, 24001);
 366   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_SUPERWIDEBAND, 24000);
 367   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_SUPERWIDEBAND, 16001);
 368   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_WIDEBAND, 16000);
 369   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_WIDEBAND, 12001);
 370   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_MEDIUMBAND, 12000);
 371   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_MEDIUMBAND, 8001);
 372   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_NARROWBAND, 8000);
 373   TestSetMaxPlaybackRate(OPUS_BANDWIDTH_NARROWBAND, 4000);
 374
 375   // Free memory.
 376   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 377   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 378 }
 379
 380 // PLC in mono mode.
 381 TEST_F(OpusTest, OpusDecodePlcMono) {
 382   // Create encoder memory.
 383   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_mono_encoder_, 1));
 384   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_mono_decoder_, 1));
 385   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_mono_decoder_new_, 1));
 386
 387   // Set bitrate.
 388   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_mono_encoder_, 32000));
 389
 390   // Check number of channels for decoder.
 391   EXPECT_EQ(1, WebRtcOpus_DecoderChannels(opus_mono_decoder_));
 392   EXPECT_EQ(1, WebRtcOpus_DecoderChannels(opus_mono_decoder_new_));
 393
 394   // Encode & decode.
 395   int16_t encoded_bytes;
 396   int16_t audio_type;
 397   int16_t output_data_decode_new[kOpusMaxFrameSamples];
 398   int16_t output_data_decode[kOpusMaxFrameSamples];
 399   encoded_bytes = WebRtcOpus_Encode(opus_mono_encoder_, speech_data_,
 400                                     kOpus20msFrameSamples, kMaxBytes,
 401                                     bitstream_);
 402   EXPECT_EQ(kOpus20msFrameSamples,
 403             WebRtcOpus_DecodeNew(opus_mono_decoder_new_, bitstream_,
 404                                  encoded_bytes, output_data_decode_new,
 405                                  &audio_type));
 406   EXPECT_EQ(kOpus20msFrameSamples,
 407             WebRtcOpus_Decode(opus_mono_decoder_, bitstream_,
 408                               encoded_bytes, output_data_decode,
 409                               &audio_type));
 410
 411   // Call decoder PLC for both versions of the decoder.
 412   int16_t plc_buffer[kOpusMaxFrameSamples];
 413   int16_t plc_buffer_new[kOpusMaxFrameSamples];
 414   EXPECT_EQ(kOpus20msFrameSamples,
 415             WebRtcOpus_DecodePlcMaster(opus_mono_decoder_, plc_buffer, 1));
 416   EXPECT_EQ(kOpus20msFrameSamples,
 417             WebRtcOpus_DecodePlc(opus_mono_decoder_new_, plc_buffer_new, 1));
 418
 419   // Data in |plc_buffer| should be the same as in |plc_buffer_new|.
 420   for (int i = 0; i < kOpus20msFrameSamples; i++) {
 421     EXPECT_EQ(plc_buffer[i], plc_buffer_new[i]);
 422   }
 423
 424   // Free memory.
 425   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_mono_encoder_));
 426   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_mono_decoder_));
 427   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_mono_decoder_new_));
 428 }
 429
 430 // PLC in stereo mode.
 431 TEST_F(OpusTest, OpusDecodePlcStereo) {
 432   // Create encoder memory.
 433   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 434   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_, 2));
 435   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_new_, 2));
 436
 437   // Set bitrate.
 438   EXPECT_EQ(0, WebRtcOpus_SetBitRate(opus_stereo_encoder_, 64000));
 439
 440   // Check number of channels for decoder.
 441   EXPECT_EQ(2, WebRtcOpus_DecoderChannels(opus_stereo_decoder_));
 442   EXPECT_EQ(2, WebRtcOpus_DecoderChannels(opus_stereo_decoder_new_));
 443
 444   // Encode & decode.
 445   int16_t encoded_bytes;
 446   int16_t audio_type;
 447   int16_t output_data_decode_new[kOpusMaxFrameSamples];
 448   int16_t output_data_decode[kOpusMaxFrameSamples];
 449   int16_t output_data_decode_slave[kOpusMaxFrameSamples];
 450   encoded_bytes = WebRtcOpus_Encode(opus_stereo_encoder_, speech_data_,
 451                                     kOpus20msFrameSamples, kMaxBytes,
 452                                     bitstream_);
 453   EXPECT_EQ(kOpus20msFrameSamples,
 454             WebRtcOpus_DecodeNew(opus_stereo_decoder_new_, bitstream_,
 455                                  encoded_bytes, output_data_decode_new,
 456                                  &audio_type));
 457   EXPECT_EQ(kOpus20msFrameSamples,
 458             WebRtcOpus_Decode(opus_stereo_decoder_, bitstream_,
 459                               encoded_bytes, output_data_decode,
 460                               &audio_type));
 461   EXPECT_EQ(kOpus20msFrameSamples,
 462             WebRtcOpus_DecodeSlave(opus_stereo_decoder_, bitstream_,
 463                                    encoded_bytes,
 464                                    output_data_decode_slave,
 465                                    &audio_type));
 466
 467   // Call decoder PLC for both versions of the decoder.
 468   int16_t plc_buffer_left[kOpusMaxFrameSamples];
 469   int16_t plc_buffer_right[kOpusMaxFrameSamples];
 470   int16_t plc_buffer_new[kOpusMaxFrameSamples];
 471   EXPECT_EQ(kOpus20msFrameSamples,
 472             WebRtcOpus_DecodePlcMaster(opus_stereo_decoder_,
 473                                        plc_buffer_left, 1));
 474   EXPECT_EQ(kOpus20msFrameSamples,
 475             WebRtcOpus_DecodePlcSlave(opus_stereo_decoder_,
 476                                       plc_buffer_right, 1));
 477   EXPECT_EQ(kOpus20msFrameSamples,
 478             WebRtcOpus_DecodePlc(opus_stereo_decoder_new_, plc_buffer_new, 1));
 479   // Data in |plc_buffer_left| and |plc_buffer_right|should be the same as the
 480   // interleaved samples in |plc_buffer_new|.
 481   for (int i = 0, j = 0; i < kOpus20msFrameSamples; i++) {
 482     EXPECT_EQ(plc_buffer_left[i], plc_buffer_new[j++]);
 483     EXPECT_EQ(plc_buffer_right[i], plc_buffer_new[j++]);
 484   }
 485
 486   // Free memory.
 487   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 488   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_));
 489   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_new_));
 490 }
 491
 492 // Duration estimation.
 493 TEST_F(OpusTest, OpusDurationEstimation) {
 494   // Create.
 495   EXPECT_EQ(0, WebRtcOpus_EncoderCreate(&opus_stereo_encoder_, 2));
 496   EXPECT_EQ(0, WebRtcOpus_DecoderCreate(&opus_stereo_decoder_, 2));
 497
 498   int16_t encoded_bytes;
 499
 500   // 10 ms.
 501   encoded_bytes = WebRtcOpus_Encode(opus_stereo_encoder_, speech_data_,
 502                                     kOpus10msFrameSamples, kMaxBytes,
 503                                     bitstream_);
 504   EXPECT_EQ(kOpus10msFrameSamples,
 505             WebRtcOpus_DurationEst(opus_stereo_decoder_, bitstream_,
 506                                    encoded_bytes));
 507
 508   // 20 ms
 509   encoded_bytes = WebRtcOpus_Encode(opus_stereo_encoder_, speech_data_,
 510                                     kOpus20msFrameSamples, kMaxBytes,
 511                                     bitstream_);
 512   EXPECT_EQ(kOpus20msFrameSamples,
 513             WebRtcOpus_DurationEst(opus_stereo_decoder_, bitstream_,
 514                                    encoded_bytes));
 515
 516   // Free memory.
 517   EXPECT_EQ(0, WebRtcOpus_EncoderFree(opus_stereo_encoder_));
 518   EXPECT_EQ(0, WebRtcOpus_DecoderFree(opus_stereo_decoder_));
 519 }
 520
 521 }  // namespace webrtc